Squeeze machine



Jan. 8 1924. 1,480,131

T. K. WEBSTER, JR

SQUEEZE MACHINE Filed May 26. 1921 2 Sheets-Sheet 1 Jan. 8 1924.

T. K. WEBSTER, JR

SQUEEZE MACHINE File y 26. 1921 2 Sheets-Sheet 2 6 .1 8 111; I11 Q Q uh& B \h 6 Q n \g same purpose.

Patented Jan. 8, 1924.

TOWNER K. WEBSTER, JR., OF WINNE'I'KA, ILLINOIS, ASSIGNOB TO FRANK D.CHASE,

INC., OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SQUEEZE MACHINE.

Application filed May 26, 1921.

Z '0 all whom it may concern Be it known that I, TOWNER K. WEBSTER, J12,a citizen of the United States, residing in l/Vinnetka, in the county ofCook and State of Illinois, have invented a new and useful Improvementin Squeeze Machines, of which the following is a specification.

This invention relates to machines for compressing or compacting sand infoundry flasks.

It has for its principal object the provision of a machine of moreeflicient action and which may be constructed of lighter material thanthose previously used for the The machines in use prior to my inventionto compact or compress the sand in a flask through the utilization ofpower as contradistinguished from hand ramming have been of twocharacters; one of these is the plain squeeze machine which compacts thesand by pressure exerted upon it and the other is a machine wherein theflask with its sand body is jolted or jarred.

My invention contemplates relatively rapid and less violent action uponthe sand producing a shaking and vibratory action as contradistinguishedfrom a jolting or jarring one. Furthermore, it contemplates theapplication of these arch preventing and destroying impacts from theside. The repeated impact forces thus supplied are not in the line ofthe compressing force which has formed the arch but transversely thereof. Pressure is applied to the sand and the vibratory action preventsthe forming of arches of sand particles resisting the press ing forcesand breaks the arches if they form.

The invention has for a further object the material shortening of thetime required in connection with a molding machine to produce a flaskcharged with sand of desired compactness and to permit of the properfilling of a deeper flask.

My invention contemplates in this regard the provision of a moldingmachine or flask ramming machine, which by reason of its constructionand operation will materially increase the fluidity of the sand chargedeposited in the flask. During the applica tion of pressure rapidlyrecurring vibrations are imparted to the sand body so that itsindividual particles are in continued motion. They move, therefore, overeach other with a sliding, as contradistinguished from Serial No.472,791.

a starting, friction and the pressure is thus transm tted to the face ofthe pattern and the desired compactness attained even within the pocketsand throughout the sand body.

Another object of the invention is the provision of simple, easilycontrolled means for operating upon the sand, and which will not belikely to require adjustment or frequent repair or replacement of parts.

Numerous other objects and advantages of the invention will be apparentas it is better understood from the following description, which, takenin connection with the accompanyingdrawings, discloses a preferredembodiment thereof.

Referring to the drawings, 7

Figure 1 is a side elevation of an apparatus embodying my presentinvention;

Fig. 2 is a transverse vertical partial section; and

Figs. 3 and 4 are enlarged sections through the control valve.

For the purpose of illustrating my present invention I have shown on thedrawings a standard squeeze machine to which struc ture a form of myinvention has been added. This machine comprises the usual frame 11which may be mounted upon rollers 12 or otherwise as may be desired andis provided with a cross-web 13 carrying an hydraulic cylinder 14 inwhich is mounted an hydraulic piston (not shown in detail) from whichextends a piston rod 15 carrying at its top a support 16. Upon thissupport is mounted a flask receiving table 17 upon which the flask 18 isadapted to be placed and locked in position by pins 19 disposed throughopenings 21 in the flask. peripheral flange 22 and into apertures 23 inthe support 16. The table with the flask is lifted against an overheadcompression member 24: held stationary during the compression action.This overhead compressor member is carried upon an arbor 25 through theends of which extend threaded rods 26 and is locked in adjusted positionby nuts 27. The rods 26 are secured at the lower ends in sleeves 28extending up from collars 29 fixed on a cross-shaft 31 mounted inbearings 32 in the bottom of the web 13. Upon the shaft 31 are linedcollars 33 and each of which engages a spring 34:, the other end ofwhich is connected or disposed behind the web 13 or hydraulic cylinder14. This arrange ment permits the arbor with its upper com J bratortl oithe fluid pressure type. Pockets 46 are provided in the upp'o'rl'a'ceoi" the support and these register with pockets e7 provided in the underface otthe table to re ceive balls or other anti-friction rolling ele- 7merits 48. The pocketsare curved or otherwise 't'or'med, as shown, sothat when the table is shifted laterally under the action of the fluidpressure plunger i5 the surfaces oi the pockets act in wedge fashionupon the balls with thetendency to-li'mit the movement and to lift theflask in a further compressive action. Fluid under pressure is suppliedfro'm'any suitable source for example the pipe 49 to a valve 51 whichc01itrols, in the present instance, the entire sand compressing action.Froni this valve a pipe line 52 leads to the vibrator ll.

Theconstruction of this valve is such that when its handle 5 l ismanipulated, fluid under-pressure is first introduced to the vibrato'rand then to the compressor cylinder and after the actionis completed isfirst cut off from the vibrator and later from the compressor. Twosections through this valve are shown and it will be noted that inaddition to the ca'sing 51 there are two concentric movable valvemembers 55 and Fig. 3 shows a section taken through the port 57, whichdischarges to the vibrator and, Fig. 4 shows a section tl'irongh theport 58 discharging to the cylinder l l.

The inner valve member 56 is the one attached to the handle 5% and isprovided with a pin 59 engaging in a" slot 61 in the member 55. Theinlet port, indicatedby reference character 62, connected at its inletside to a vertical passage 63 having a slde extension pocket 64L. Thevalve member 56 has a drametric port 65 adapted to be brought intoregistration with the port 57 and in contact with a port 66 through thevalve members 55 at one side and with a wider port 67 in this member atthe other side. The arrangement shown in Fig. 3 is that assumed by theparts when the vibrator ll is opened to pressure. When it is desired toclose this port the ha'nd'leis turned moving the pin 59 in a clockwisedirection causing the pressure to be immediatelyinterrupted by movementof se ta a over the port 66. Continued movement, as will be presentlydescribed, lief at the compressor cylinder 14 ovement' of the valvemember 55. v This out lor 55 halt formed by port 63 and extension 6lthereof and moves the part 0 up toward port 57 but not across it. Itnow the handle is moved in the opposite direction the member55remainsstationary while the pin 59 is moving in the slot 61 so that the part aoi valve member 56 uncovers the port 66 and immediately reestablishescommunication between the vibratorcylinder and before movement of thevalve member 55 has taken place.

The valve 56 is the part that controls the admission of fluid, underpressure to the compressor cylinder let. 4

Referring now to F 4: it will be noted that the valve member 55 has aport v'Tl adapted to be'brought into registration with the port 62,already mentioned, and a second and wider port 72 that is adapted to bebrought into communication with the port 58 01' an outlet of exhaustport 73 through the side of the valve casing. The ports 58 and 73 haveextension toward each other, as indicated at M and 75, to permit thewidened port 72 to establish communication between the cylinder 1 1-a'nd theexhaustport when the valve 58 is movedin' avclocle wisedirection from the position shown in Figa l.

At the. level opposite the outlet 5'8 the inner valve member 56 ispartly cut away at 76 so that this valve'momber willn'ot in teri'ereinany position with the delivery of fluid to the cylinder 14. Whenarranged as in F at it will be noted that communication is establishedbetween the source of fluid under pressure and the cylinder 14. When,however, the handle is moved in a clockwise direction the inner valvemember 56 is stationary until the pin 59 engages the opposite end of theslot 61. At this point, as has been stated, the vibrator has becomeinoperative and further movement or the handle results inaccon'i'panying movement at tl'ic valve part 55 causing its port cl toclose the inlet port 62 and at the same time aarrange, the port- T2 incommunication with the extensions Tet and 75 of the ports 58 and 73. I

i Vhen the valve handle is moved in the opposite direction to bring thecompressor into action the valve member 56 n10ves first permitting lluidunder pressure to' be admitted to the vibrator, already described, thevalve part being stationary until the pin has arrived at the oppositeend of the slot, further movement thereafterarranging the parts as shownin Fig. 4;. I

will be notedth'at the vibrator may be attached to machines alreadyconstructed and in use by merely arranging theballsbe-I tween the tableand support, adding the bracket with its vibrator and substituting thecontrol system with its piping for that previously use.

is a meagre that are alienate tria- Hire-v lll) of its attendantadvantages will be understood from the foregoing description, and itwill be apparent that various changes may be made in the form,construction and arrangement of the parts without departing from thespirit and scope of the invention or sacrificing all of its materialadvantages, the form hereinbefore described being merely a preferredembodiment thereof.

I claim:

1. In a machine for forming sand molds, the combination of squeezingmechanism -for compressing the sand in the mold a support with respectto which a part of the mold is transversely movable, and means forvibrat ing the sand during its compression by reciprocation of saidmovable mold part.

2. In a. machine for forming sand molds, the combination of squeezingmechanism for compressing the sand in the mold a support with respect towhich a part of the mold is transversely movable, and means forvibrating the sand laterally of the squeezing pressure during thecompressing of the sand by reciprocation of said movable mold part.

3. In a machine for forming sand molds, the combination of squeezingmechanism for compressing the sand in the mold a support with respect towhich a part of the mold is transversely movable, and means forimparting short stroke, rapidly recurring vibration to the sand duringits compressing by reciprocation of said movable mold part.

4. In a machine for forming sand molds, the combination of squeezingmechanism for compressing the sand in the mold, and means for vibratingthe sand both across and in the line of pressure during the compressing.

5. In a machine for forming sand molds, the combination of a movablecompression member, a fixed compression member, said members beingadapted to receive a mold therebetween, a. support with respect to whichthe mold is transversely movable, and means for vibrating the mold bylateral reciprocation of said movable member.

6. In a machine for forming sand molds, the combination of a compressor,a support, a table carried by said support, anti-friction devicesbetween said table and support, a compression member located above thetable, and means for vibrating said table during the exertion ofpressure by said compression members upon the sand in the flask.

7. In a machine for forming sand molds, the combination of a compressor,a support,

a table, said table and said support having registering pockets,anti-friction rolling elements mounted in said pockets, and means forvibrating the table during the exertion of pressure by said compressoron the sand in a flask upon said table.

8. In a machine for forming sand molds, the combination of a compressor,a support, a table, said table and said support having registeringpockets, anti-friction rolling elements mounted in said pockets, andmeans for vibrating the table during the exertion of pressure by saidcompressor on the sand in a flask upon said table, said pockets being ofform to produce a wedging and resulting increased compression actionunder the action of said vibrating means.

9. In a machine for forming sand molds, the combination of a fluidpressure compressor, a fluid pressure vibrator, a source of fluid underpressure, and a common control valve for said compressor and vibrator.

10. In a machine for forming sand molds, the combination of a fluidpressure compressor, a fluid pressure vibrator, a source of fluid underpressure, a common control valve for said compressor and vibrator, saidvalve introducing fluid under pressure to said vibrator in advance ofsaid compressor.

11. In a machine for forming sand molds, the combination of a fluidpressure compressor, a fluid pressure vibrator, a source of fluid underpressure, a common control valve for said compressor and vibrator, saidvalve relieving said vibrator of pressure prior to the relief of saidcompressor.

12. In a; machine for forming sand molds, the combination of a fluidpressure compressor, a fluid pressure vibrator, a source of fluid underpressure, a common control valve for said compressor and vibrator, saidvalve introducing pressure to said vibrator in advance-of saidcompressor and insuring delivery of pressure to said compressor afterrelief of said vibrator.

TOWNER K. WEBSTER, JR.

